Heera Fm
Period:
Paleogene
Age Interval:
Late Oligocene
Province:
W.India Mumbai Offshore
Type Locality and Naming
[Figure: Lithostratigraphy in Mumbai Offshore blocks (from NDRDGH.gov.in; after Jitendra Misra, 2009)]
Lithology and Thickness
Shale on Raju's chart; but DGH implies calcareous => a thick deposit of carbonate facies that act as a cap rock. 15m on Raju's chart..
[Figure 1: Formations and their reference sections in Mumbai Offshore Basin (after Pandey and Dave, 1998)]
Lithology Pattern:
Clayey limestone
Relationships and Distribution
Upper contact
GeoJSON
{"type":"Feature","geometry":{"type":"MultiPolygon","coordinates":[[[[70.52,21.08],[71.4,20.64],[71.78,20.77],[71.82,20.95],[72.25,21.14],[72.33,21.46],[72.53,21.43],[72.81,20.82],[72.63,20.56],[72.6,20.11],[72.96,17.91],[72.7,17.72],[72.14,18.51],[71.59,19.09],[71.29,19.51],[70.8,20],[70.5,21.04],[70.52,21.08]]]]}}
Fossils
Age
Shown as middle Rupelian on NDRDGH.gov Mumbai stratigraphic chart; but can locally extend down to base-Rupelian.
Age Span:
Beginning stage:
Rupelian
Fraction up in beginning stage:
0.3
Beginning date (Ma):
31.92
Ending stage:
Rupelian
Fraction up in the ending stage:
0.8
Ending date (Ma):
28.61
Depositional setting
Depositional pattern:
Additional Information
Compiler:
D.S.N Raju